If the Chinese want to build more Chernobyls - more power [double entendre] to them.
Like I posted on an earlier Chinese space program thread, they're technologically backward but can simply buy whatever technology they need. The Chinese space program is essentially a Russian import, from hardware to astronaut training.
I did some research on these "Tianwan" reactors, it looks like Russia is only one of several sources where the Chinese are buying from:
http://www.nti.org/db/china/pwrrctr.htm
They're spending billions of dollars to purchase nuclear reactor and technology from France, Russia, Japan, Canada, and believe it or not, South Korea. According to Wired, they want to built 30 nuclear reactors by 2020, and experts have suggested that they may operate as many as 200 nuclear power plants by 2050:
http://www.wired.com/wired/archive/12.09/china.html
For those who thinks the Chinese are getting ahead of us, I'd like to remind you that we have more than 100 nuclear power plants in operation, providing 20% of our electricity. Even if the Chinese build 30 new plants by 2020, they'd still be far behind us:
http://www.nei.org/doc.asp?catnum=2&catid=93